How do you run Java application

1. First take the copy of Java in c: directory. Let the directory name is "Jdk1.3". The main files stored in bin is sub directory of Jdk1.3.

2. Click on Start > Run. Type cmd and click Ok bottom. It will open the Command Prompt of windows.

3. Type edit AUTOEXEC.BAT on Command Prompt.

4. Add a new line in the autoexec.bat file, such as, PATH=%PATH%;C:\jdk1.3\bin;I:\jdk1.3\myproject; myproject is a directory where all java programs stored. Save and close the file. Restart the computer to set the PATH.

You can set the CLASSPATH environment variable to include that directory. By default, there are no paths or directories in CLASSPATH , but you can add a semicolon - separated list to CLASSPATH like this one for windows.

C:\> SET CLASSPATH=c:\classes;c:\newclasses;%CLASSPATH %

Now the java compiler (and other java tools) will know enough to search c:\classes and c:\newclasses automatically. That means that this code will now work if printer.class (own class) is in c:\classes, because that directory is in CLASSPATH.

Note: CLASSPATH is very important while we compile java program. Remember after compiling a written program in java it creates a .class file which must be stored in that directory which set at CLASSPATH.